Pipe-cover.



W. A. BOUTELLE.

PIPE COVER. APPLICATION FIILED APR.261 1911.

1 2 3 6, 398; Patented Aug. 14; 1917.

TINTTED WILLIAM A. BOUTELLE, OF PROVIDENCE, RHODE ISLAND.

PIPE-COVER.

Specification of Letters Patent.

Patented Aug. ML, 191?.

Application filed April 26, 1917. Serial No. 164,648.

To all whom it may concern:

Be it known that I, WILLIAM A. BOU- TELLE, a citizen of the United States, residing at Providence, in the county of Providence and State of Rhode Island, have invented certain new and useful Improvements in Pipe-Covers, of which the following is a specification.

My invention relates to covers or shields adapted for insertion into the open end of smoking pipe bowls to protect the contents of the bowl from the violent action of air, while permitting the presence of air in a sufiicient quantity for the necessary combustion of the tobacco.

The essential objects of my invention are strength; simplicity and facility of action; the avoidance of the use of helical springs and of solder, both of which elements are a source of mechanical weakness in such structures; to accommodate the device to use with bowls of various sizes; and to attain these objects in a structure comprising a minimum number of parts and capable of being out and bent up from thin sheet metal, blanks, or strips.

To the above enumerated ends my invention consists in such parts and combinations of parts as fall within the scope of the appended claims.

In the accompanyin drawings which form a part of this speci cation Figures 1 and 2 are top and bottom plan views respectively of my cover in contracted position,

Fig. 3, a side elevation of the same,

Fig. 4:, a side or end elevation of the cover viewed at an angle of ninety degrees from the position shown in Fig. 3, and engaging the open end of a pipe bowl, the latter being shown in section, and

Fig. 5, a plan elevation of the same in expanded position.

Like reference characters indicate like parts throughout the views.

My cover comprises upper and lower segmental plates A and B respectively cut from a sheet of thin metal provided respectively at intermediate portions of their peripheries with laterally projecting integral strips bent by tools or otherwise as follows: The strip upon plate A is vertically folded to form a finger piece 0, the material of the strip being continued downwardly and inwardly against the lower face of the plate A formmg a layer 0 at this point, whence the ma terial extends downwardly forming a depending lug (Z integral with whose side, and at right angles to which, is an angular lip e inwardly disposed and spaced slightly from the plate A. The projecting material upon the periphery'of the member B is similarly bent to form in like manner a similar finger piece 0 whose extended portion 0 terminates in a depending lug cl integral with an attaching lip e. The segmental plates A and B are each somewhat greater than a half circle to enable the non-curved margins of the plates to overlap somewhat. Near one end of the overlapped portions, the plates are pivotally connected with each other in any suitable manner. In the present instance, this connection consists of a pintle or pivot rivet F passing through perforations g and g respectively in plates A and B, and having heads h and it upon its ends loosely embracing the plates. Diametrically opposite the pivot F the plate A is provided near its margin with an arcuate slot I through which passes a pin J fixed by a rivet flange k in an opening is in the plate B. Upon the top of the pin J is a head Z adapted to slide loosely upon the upper face of the plate A. The described pin and slot construction serves to keep the pivoted overlapping plates A and B in slidable contact with each other when pivotal action is imparted thereto by means of manually compressing the finger pieces C and C. It is convenient, but not essential, to provide ventilating holes in the plates. If these are employed, they may be arranged in some such manner as herein shown, the openings m, m, and m being located in alinement with each other across the plate A, and the opening m being located at one side of the first mentioned openings in this plate. In the lower plate B, are corresponding openings n, 01., M, and 01. The opening a being located remotely from the pivot pin F is arcuate in form to insure a registration with the opening m in whatever relative pivotal position the plates A and B may assume. The extent of relative travel of the two plates is limited by the length of the slot I with which the pin J cooperates.

The opening a, in this instance, is oblong occasioned by the cutting therein of a strip which is bent up to form an integral sleeve 0 located adjacent the pintle F upon the plate B. This sleeve holds a spring P which in detail comprises a central loop 51 emwhich hold these ends in contact with the.

bottom faces of the plates A and B respectively.

It will be observed that the spring P normally presses the plates in opposite directions, expanding the same relatively to each other, and forcing the lugs (Z and d against the inner surface of the pipe bowl U. This pressure is sufiicient to maintain the cover in engagement with the pipe bowl. To remove the device, the finger pieces C and C are manually pressed toward each other, and the cover thereby may be then lifted from the bowl.

I claim 1. In a pipe cover, the combination of two overlapping segmental plates pivotally attached to each other at one end, one of said plates being provided with an oblong slot, a pin in the other plate registering in the slot, finger pieces upon the plates, and spring means for normally distending the plates.

2. In a pipe cover, the combination of two overlapping segmental plates pivotally attached to each other at one end, one of said plates being provided with a marginal segmental slot opposite the point of attachment of the plates, a pin on the second plate registering in the slot, finger pieces upon the plates, and spring means for distending the plates.

3. In a pipe cover, the combination of two segmental plates having their non curved margins overlapping each other, a pivot connecting the plates at one end, one of said plates being provided with an oblong slot near its other end, a pin in the second plate registering in the slot, finger pieces upon the tops of the plates, lugs upon the lower faces of the plates, and resilient arms fixed to the second plate pressing against the lugs.

41-. In a pipe cover, the combination of two segmental plates having their non curved margins overlapping each other, a pivot connecting the plates at one end, one of said plates being provided with an oblong slot near its other end, a pin in the second plate registering in the slot, finger pieces on the plates, depending lugs upon the plates, a spring comprising resilient arms fixed to one plate, and lips on the lugs engaging the arms.

In testimony whereof I have affixed my signature.

WILLIAM A. BOUTELLE.

Copierof this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

